#!/usr/bin/python

# This is statement is required by the build system to query build info
if __name__ == '__build__':
    raise Exception

'''
scene.c from the Redbook examples.
Converted to Python by Jason Petrone(jp@demonseed.net) 8/00

/*
 * Copyright (c) 1993-1997, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED
 * Permission to use, copy, modify, and distribute this software for
 * any purpose and without fee is hereby granted, provided that the above
 * copyright notice appear in all copies and that both the copyright notice
 * and this permission notice appear in supporting documentation, and that
 * the name of Silicon Graphics, Inc. not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission.
 *
 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * US Government Users Restricted Rights
 * Use, duplication, or disclosure by the Government is subject to
 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
 * clause at DFARS 252.227-7013 and/or in similar or successor
 * clauses in the FAR or the DOD or NASA FAR Supplement.
 * Unpublished-- rights reserved under the copyright laws of the
 * United States.  Contractor/manufacturer is Silicon Graphics,
 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
 *
 * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
 */

/*
 *  scene.c
 *  This program demonstrates the use of the GL lighting model.
 *  Objects are drawn using a grey material characteristic.
 *  A single light source illuminates the objects.
 */

'''

import sys

try:
    from OpenGL.GLUT import *
    from OpenGL.GL import *
except:
    print('''
ERROR: PyOpenGL not installed properly.
        ''')
    sys.exit()


# Initialize material property and light source.
def init():
    light_ambient = [0.0, 0.0, 0.0, 1.0]
    light_diffuse = [1.0, 1.0, 1.0, 1.0]
    light_specular = [1.0, 1.0, 1.0, 1.0]
    #  light_position is NOT default value
    light_position = [1.0, 1.0, 1.0, 0.0]

    glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient)
    glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse)
    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular)
    glLightfv(GL_LIGHT0, GL_POSITION, light_position)

    glEnable(GL_LIGHTING)
    glEnable(GL_LIGHT0)
    glEnable(GL_DEPTH_TEST)


def display():
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    glPushMatrix()
    glRotatef(20.0, 1.0, 0.0, 0.0)
    glPushMatrix()
    glTranslatef(-0.75, 0.5, 0.0);
    glRotatef(90.0, 1.0, 0.0, 0.0)
    glutSolidTorus(0.275, 0.85, 15, 15)
    glPopMatrix()

    glPushMatrix()
    glTranslatef(-0.75, -0.5, 0.0);
    glRotatef(270.0, 1.0, 0.0, 0.0)
    glutSolidCone(1.0, 2.0, 15, 15)
    glPopMatrix()

    glPushMatrix()
    glTranslatef(0.75, 0.0, -1.0)
    glutSolidSphere(1.0, 15, 15)
    glPopMatrix()

    glPopMatrix()
    glFlush()


def reshape(w, h):
    glViewport(0, 0, w, h)
    glMatrixMode(GL_PROJECTION)
    glLoadIdentity()
    if w <= h:
        glOrtho(-2.5, 2.5, -2.5 * h / w, 2.5 * h / w, -10.0, 10.0)
    else:
        glOrtho(-2.5 * w / h, 2.5 * w / h, -2.5, 2.5, -10.0, 10.0)
    glMatrixMode(GL_MODELVIEW)
    glLoadIdentity()


def keyboard(key, x, y):
    if key == chr(27):
        sys.exit(0)


#  Main Loop
#  Open window with initial window size, title bar,
#  RGBA display mode, and handle input events.

glutInit(sys.argv)
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH)
glutInitWindowSize(500, 500)
glutCreateWindow('scene')
init()
glutReshapeFunc(reshape)
glutKeyboardFunc(keyboard)
glutDisplayFunc(display)
glutMainLoop()
